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Article: Is informal child care associated with childhood obesity? Evidence from Hong Kong's "children of 1997" birth cohort

TitleIs informal child care associated with childhood obesity? Evidence from Hong Kong's "children of 1997" birth cohort
Authors
KeywordsBMI
Child care
Children
Cohort study
Informal care
Obesity
Issue Date2011
PublisherOxford University Press. The Journal's web site is located at http://ije.oxfordjournals.org/
Citation
International Journal Of Epidemiology, 2011, v. 40 n. 5, p. 1238-1246 How to Cite?
AbstractBackground: In Western populations, informal child care is associated with childhood obesity. However, informal child care and obesity share social patterning making evidence from other settings valuable. Methods: We used multivariable linear and logistic regression models to estimate the association of child care at 6 months and at 3, 5 and 11 years with body mass index (BMI) z-score and overweight (including obesity) at 11 years in a Hong Kong Chinese birth cohort. We assessed whether associations varied with sex or socio-economic position (SEP). We used multiple imputation for missing exposures and confounders. Results: Of the original 8327 cohort members, 7933 are alive, participating and living in Hong Kong. At ~11 years, 6796 had their BMI clinically assessed. Higher SEP was associated with informal care. After imputation, informal care at each of 3, 5 or 11 years was separately associated with higher BMI z-score [3 years 0.10, 95% confidence interval (CI) 0.03-0.18, 5 years 0.12, 95% CI 0.04-0.21, 11 years 0.17, 95% CI 0.04-0.31] and with the presence of overweight [odds ratio (OR) 3 years 1.19, 95% CI 1.03-1.37, 5 years OR 1.20, 95% CI 1.03-1.40, 11 years OR 1.21, 95% CI 1.02-1.45], adjusted for sex, SEP and birth weight z-score. Current informal care had the strongest association. However, informal child care at 5 years also contributed. There was no evidence of differences by sex or SEP. Conclusions: In a developed, non-Western setting, informal child care was associated with childhood obesity. Modifiable attributes of informal child care warrant investigation for obesity prevention.
Persistent Identifierhttp://hdl.handle.net/10722/143813
ISSN
2015 Impact Factor: 7.522
2015 SCImago Journal Rankings: 4.381
ISI Accession Number ID
Funding AgencyGrant Number
Health Care and Promotion Fund, Health and Welfare Bureau, Government of Hong Kong (HCPF)216106
Health and Health Services Research Fund (HHSRF)03040771
Research Fund for the Control of Infectious Diseases in Hong Kong (RFCID)04050172
06060592
Government of the Hong Kong SAR
University Research Committee Strategic Research Theme (SRT) of Public Health Granted Research, The University of Hong Kong
Funding Information:

The initial 'Infant Health and Lifestyle Survey' was funded by the Health Care and Promotion Fund, Health and Welfare Bureau, Government of Hong Kong (HCPF Grant #216106). Since 2005, the 'Children of 1997' birth cohort has been funded by the Health and Health Services Research Fund (HHSRF Grant #03040771) and the Research Fund for the Control of Infectious Diseases in Hong Kong (RFCID Grants #04050172, 06060592), Government of the Hong Kong SAR. The 'Children of 1997' birth cohort has also received funding from the University Research Committee Strategic Research Theme (SRT) of Public Health Granted Research, The University of Hong Kong.

References
Grants

 

DC FieldValueLanguage
dc.contributor.authorLin, SLen_HK
dc.contributor.authorLeung, GMen_HK
dc.contributor.authorHui, LLen_HK
dc.contributor.authorLam, THen_HK
dc.contributor.authorSchooling, CMen_HK
dc.date.accessioned2011-12-21T08:56:36Z-
dc.date.available2011-12-21T08:56:36Z-
dc.date.issued2011en_HK
dc.identifier.citationInternational Journal Of Epidemiology, 2011, v. 40 n. 5, p. 1238-1246en_HK
dc.identifier.issn0300-5771en_HK
dc.identifier.urihttp://hdl.handle.net/10722/143813-
dc.description.abstractBackground: In Western populations, informal child care is associated with childhood obesity. However, informal child care and obesity share social patterning making evidence from other settings valuable. Methods: We used multivariable linear and logistic regression models to estimate the association of child care at 6 months and at 3, 5 and 11 years with body mass index (BMI) z-score and overweight (including obesity) at 11 years in a Hong Kong Chinese birth cohort. We assessed whether associations varied with sex or socio-economic position (SEP). We used multiple imputation for missing exposures and confounders. Results: Of the original 8327 cohort members, 7933 are alive, participating and living in Hong Kong. At ~11 years, 6796 had their BMI clinically assessed. Higher SEP was associated with informal care. After imputation, informal care at each of 3, 5 or 11 years was separately associated with higher BMI z-score [3 years 0.10, 95% confidence interval (CI) 0.03-0.18, 5 years 0.12, 95% CI 0.04-0.21, 11 years 0.17, 95% CI 0.04-0.31] and with the presence of overweight [odds ratio (OR) 3 years 1.19, 95% CI 1.03-1.37, 5 years OR 1.20, 95% CI 1.03-1.40, 11 years OR 1.21, 95% CI 1.02-1.45], adjusted for sex, SEP and birth weight z-score. Current informal care had the strongest association. However, informal child care at 5 years also contributed. There was no evidence of differences by sex or SEP. Conclusions: In a developed, non-Western setting, informal child care was associated with childhood obesity. Modifiable attributes of informal child care warrant investigation for obesity prevention.en_HK
dc.languageengen_US
dc.publisherOxford University Press. The Journal's web site is located at http://ije.oxfordjournals.org/en_HK
dc.relation.ispartofInternational Journal of Epidemiologyen_HK
dc.subjectBMIen_HK
dc.subjectChild careen_HK
dc.subjectChildrenen_HK
dc.subjectCohort studyen_HK
dc.subjectInformal careen_HK
dc.subjectObesityen_HK
dc.subject.meshBody Mass Index-
dc.subject.meshChild Care - methods - statistics and numerical data-
dc.subject.meshHong Kong - epidemiology-
dc.subject.meshObesity - epidemiology-
dc.subject.meshOverweight - epidemiology-
dc.titleIs informal child care associated with childhood obesity? Evidence from Hong Kong's "children of 1997" birth cohorten_HK
dc.typeArticleen_HK
dc.identifier.emailLeung, GM: gmleung@hku.hken_HK
dc.identifier.emailHui, LL: huic@hkucc.hku.hken_HK
dc.identifier.emailLam, TH: hrmrlth@hkucc.hku.hken_HK
dc.identifier.emailSchooling, CM: cms1@hkucc.hku.hken_HK
dc.identifier.authorityLeung, GM=rp00460en_HK
dc.identifier.authorityHui, LL=rp01698en_HK
dc.identifier.authorityLam, TH=rp00326en_HK
dc.identifier.authoritySchooling, CM=rp00504en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1093/ije/dyr086en_HK
dc.identifier.pmid21624932-
dc.identifier.scopuseid_2-s2.0-80755169487en_HK
dc.identifier.hkuros198013en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80755169487&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume40en_HK
dc.identifier.issue5en_HK
dc.identifier.spage1238en_HK
dc.identifier.epage1246en_HK
dc.identifier.isiWOS:000296634900016-
dc.publisher.placeUnited Kingdomen_HK
dc.relation.projectImpact of breastfeeding on hospitalizations from infectious diseases in Hong Kong Chinese children up to eight years of age-
dc.relation.projectInfectious illness and secondhand smoke exposure in utero and during the first 8 years of life-
dc.relation.projectShort- and medium-term outcomes of accelerated infant growth in Hong Kong Chinese birth cohort-
dc.identifier.scopusauthoridLin, SL=54383821500en_HK
dc.identifier.scopusauthoridLeung, GM=7007159841en_HK
dc.identifier.scopusauthoridHui, LL=12774460100en_HK
dc.identifier.scopusauthoridLam, TH=7202522876en_HK
dc.identifier.scopusauthoridSchooling, CM=12808565000en_HK

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